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Method for preparing graphene-nickel hydroxide composite electrode material for super capacitor

A technology of supercapacitors and nickel hydroxide, applied in capacitors, electrolytic capacitors, circuits, etc., can solve the problems of complex and cumbersome chemical synthesis paths, difficult to repeat preparation conditions, high-cost synthetic raw materials, etc., and achieve good cycle stability, Effect of short response time and high specific capacitance value

Inactive Publication Date: 2012-02-15
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In terms of the preparation of composite electrode materials, complex and cumbersome chemical synthesis routes, high-cost synthetic raw materials, time-consuming preparation processes, and uncontrollable and difficult-to-repeat preparation conditions have become strong obstacles and bottlenecks that limit its development and industrialization.

Method used

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  • Method for preparing graphene-nickel hydroxide composite electrode material for super capacitor
  • Method for preparing graphene-nickel hydroxide composite electrode material for super capacitor
  • Method for preparing graphene-nickel hydroxide composite electrode material for super capacitor

Examples

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Embodiment 1

[0049] 1) Use nickel foam as the substrate, use PECVD equipment, heat up to 800°C in a hydrogen atmosphere, and the heating rate is 20°C / min. When this temperature is reached, methane gas is introduced to make the ratio of methane to hydrogen 1:8 , the total pressure is controlled at 4 Torr;

[0050] 2) In the PECVD equipment, after step 1) is completed, the RF power is turned on, the RF power is controlled at 200W, and the deposition time is 30min;

[0051] 3) After the reaction is over, continue to pass hydrogen to room temperature;

[0052] 4) With 0.1M Ni(NO 3 ) 2 As the electrolyte, the surface of the graphene-nickel foam substrate material prepared by the above method in contact with the plasma environment is used as the working electrode opposite to the platinum sheet, the platinum sheet is the counter electrode, and the saturated calomel electrode is the reference electrode. , to -1mA / cm 2 Constant current deposition of nickel hydroxide, the time is 12min.

[0053...

Embodiment 2

[0062] 1) Using nickel foam as the substrate, using PECVD equipment, the temperature is raised to 800°C in a hydrogen atmosphere, and the heating rate is 20°C / min. When this temperature is reached, methane gas is introduced so that the ratio of methane to hydrogen is 1:8 , the total pressure is controlled at 4Torr;

[0063] 2) In the PECVD equipment, after step 1) is completed, the RF power is turned on, the RF power is controlled at 200W, and the deposition time is 30min;

[0064] 3) After the reaction is over, continue to pass hydrogen to room temperature;

[0065] 4) With 0.1M Ni(NO 3 ) 2 For the electrolyte, the surface of the graphene-nickel foam substrate material prepared by the above method is in contact with the PECVD reaction chamber stage (that is, the side that is not in contact with the plasma environment) as the opposite working surface of the platinum sheet. Electrode, platinum sheet as counter electrode, saturated calomel electrode as reference electrode, wi...

Embodiment 3

[0068] 1) Use nickel foam as the substrate, use PECVD equipment, heat up to 800°C in a hydrogen atmosphere, and the heating rate is 20°C / min. When this temperature is reached, methane gas is introduced to make the ratio of methane to hydrogen 1:8 , the total pressure is controlled at 4 Torr;

[0069] 2) In the PECVD equipment, after step 1) is completed, the RF power is turned on, the RF power is controlled at 200W, and the deposition time is 30min;

[0070] 3) After the reaction is over, continue to pass hydrogen to room temperature;

[0071] 4) With 0.1M Ni(NO 3 ) 2 As the electrolyte, the graphene-nickel foam substrate material prepared by the above method is used as the working electrode, the platinum sheet is used as the counter electrode, and the saturated calomel electrode is used as the reference electrode. 2 Constant current deposition of nickel hydroxide, the time is 3min.

[0072] According to the exemplifying method of the above-mentioned invention, the in-situ...

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Abstract

The invention provides a method for preparing a graphene-nickel hydroxide composite electrode material for a super capacitor. The method is characterized by comprising the following steps: preparing a graphene substrate film material through chemical vapor deposition of carbon source gas and hydrogen in plasma enhanced chemical vapor deposition reaction equipment and realizing graphene in-situ growth-nickel hydroxide zero addition compositing through electrochemical deposition of nickel hydroxide. The specific capacitance of the composite electrode material prepared by the method can reach 1918F / g at most and can still maintain more than 80% after hundreds of circulation of high-current charge / discharge. The method is simple and effective; the production cost is reduced; at the same time,the electrode has excellent electrochemical property and is expected to serve as an anode material in the super capacitor for energy storage; the overall property of the electrode material is improved; and the way is widened for development of such fields as hybrid energy power.

Description

Technical field: [0001] The invention relates to a method for preparing a graphene-nickel hydroxide composite electrode material for a supercapacitor, more specifically, the invention relates to a method for preparing a graphene-nickel hydroxide composite positive electrode material in a supercapacitor energy storage device. Background technique: [0002] With the aggravation of global warming, environmental pollution and other issues, as well as the substantial increase in human demand for energy, scientific research institutions and manufacturers have focused their research and development on energy storage and conversion equipment. Supercapacitors are expected to become the future star of the energy field due to their good power characteristics, long cycle life, and low maintenance costs. Their ideal applications include: emergency power supply, peak power supply for electric vehicle batteries, and other energy storage fields. According to the different energy storage met...

Claims

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Application Information

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IPC IPC(8): H01G9/042
Inventor 郑伟涛王欣王雅玉闫宝玉
Owner JILIN UNIV
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